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We have designed a near-infrared wavelength Si/CaF_{2} DFB quantum cascade laser and investigated the possibility of single-mode laser oscillation by analysis of the propagation mode, gain, scattering time of Si quantum well, and threshold current density. As the waveguide and resonator, a slab-type waveguide structure with a Si/CaF_{2} active layer sandwiched by SiO_{2} on a Si (111) substrate and a grating structure in an n-Si conducting layer were assumed. From the results of optical propagation mode analysis, by assuming a λ/4-shifted bragg waveguide structure, it was found that the single vertical and horizontal TM mode propagation is possible at the designed wavelength of 1.70µm. In addition, a design of the active layer is proposed and its current injection capability is roughly estimated to be 25.1kA/cm^{2}, which is larger than required threshold current density of 1.4kA/cm^{2} calculated by combining analysis results of the scattering time, population inversion, gain of quantum cascade lasers, and coupling theory of a Bragg waveguide. The results strongly indicate the possibility of single-mode laser oscillation.

- Publication
- IEICE TRANSACTIONS on Electronics Vol.E106-C No.5 pp.157-164

- Publication Date
- 2023/05/01

- Publicized
- 2022/11/04

- Online ISSN
- 1745-1353

- DOI
- 10.1587/transele.2022ECP5045

- Type of Manuscript
- PAPER

- Category
- Lasers, Quantum Electronics

Gensai TEI

Tokyo Institute of Technology

Long LIU

Tokyo Institute of Technology

Masahiro WATANABE

Tokyo Institute of Technology

The copyright of the original papers published on this site belongs to IEICE. Unauthorized use of the original or translated papers is prohibited. See IEICE Provisions on Copyright for details.

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Gensai TEI, Long LIU, Masahiro WATANABE, "Design and Analysis of Si/CaF2 Near-Infrared (λ∼1.7µm) DFB Quantum Cascade Laser for Silicon Photonics" in IEICE TRANSACTIONS on Electronics,
vol. E106-C, no. 5, pp. 157-164, May 2023, doi: 10.1587/transele.2022ECP5045.

Abstract: We have designed a near-infrared wavelength Si/CaF_{2} DFB quantum cascade laser and investigated the possibility of single-mode laser oscillation by analysis of the propagation mode, gain, scattering time of Si quantum well, and threshold current density. As the waveguide and resonator, a slab-type waveguide structure with a Si/CaF_{2} active layer sandwiched by SiO_{2} on a Si (111) substrate and a grating structure in an n-Si conducting layer were assumed. From the results of optical propagation mode analysis, by assuming a λ/4-shifted bragg waveguide structure, it was found that the single vertical and horizontal TM mode propagation is possible at the designed wavelength of 1.70µm. In addition, a design of the active layer is proposed and its current injection capability is roughly estimated to be 25.1kA/cm^{2}, which is larger than required threshold current density of 1.4kA/cm^{2} calculated by combining analysis results of the scattering time, population inversion, gain of quantum cascade lasers, and coupling theory of a Bragg waveguide. The results strongly indicate the possibility of single-mode laser oscillation.

URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.2022ECP5045/_p

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@ARTICLE{e106-c_5_157,

author={Gensai TEI, Long LIU, Masahiro WATANABE, },

journal={IEICE TRANSACTIONS on Electronics},

title={Design and Analysis of Si/CaF2 Near-Infrared (λ∼1.7µm) DFB Quantum Cascade Laser for Silicon Photonics},

year={2023},

volume={E106-C},

number={5},

pages={157-164},

abstract={We have designed a near-infrared wavelength Si/CaF_{2} DFB quantum cascade laser and investigated the possibility of single-mode laser oscillation by analysis of the propagation mode, gain, scattering time of Si quantum well, and threshold current density. As the waveguide and resonator, a slab-type waveguide structure with a Si/CaF_{2} active layer sandwiched by SiO_{2} on a Si (111) substrate and a grating structure in an n-Si conducting layer were assumed. From the results of optical propagation mode analysis, by assuming a λ/4-shifted bragg waveguide structure, it was found that the single vertical and horizontal TM mode propagation is possible at the designed wavelength of 1.70µm. In addition, a design of the active layer is proposed and its current injection capability is roughly estimated to be 25.1kA/cm^{2}, which is larger than required threshold current density of 1.4kA/cm^{2} calculated by combining analysis results of the scattering time, population inversion, gain of quantum cascade lasers, and coupling theory of a Bragg waveguide. The results strongly indicate the possibility of single-mode laser oscillation.},

keywords={},

doi={10.1587/transele.2022ECP5045},

ISSN={1745-1353},

month={May},}

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TY - JOUR

TI - Design and Analysis of Si/CaF2 Near-Infrared (λ∼1.7µm) DFB Quantum Cascade Laser for Silicon Photonics

T2 - IEICE TRANSACTIONS on Electronics

SP - 157

EP - 164

AU - Gensai TEI

AU - Long LIU

AU - Masahiro WATANABE

PY - 2023

DO - 10.1587/transele.2022ECP5045

JO - IEICE TRANSACTIONS on Electronics

SN - 1745-1353

VL - E106-C

IS - 5

JA - IEICE TRANSACTIONS on Electronics

Y1 - May 2023

AB - We have designed a near-infrared wavelength Si/CaF_{2} DFB quantum cascade laser and investigated the possibility of single-mode laser oscillation by analysis of the propagation mode, gain, scattering time of Si quantum well, and threshold current density. As the waveguide and resonator, a slab-type waveguide structure with a Si/CaF_{2} active layer sandwiched by SiO_{2} on a Si (111) substrate and a grating structure in an n-Si conducting layer were assumed. From the results of optical propagation mode analysis, by assuming a λ/4-shifted bragg waveguide structure, it was found that the single vertical and horizontal TM mode propagation is possible at the designed wavelength of 1.70µm. In addition, a design of the active layer is proposed and its current injection capability is roughly estimated to be 25.1kA/cm^{2}, which is larger than required threshold current density of 1.4kA/cm^{2} calculated by combining analysis results of the scattering time, population inversion, gain of quantum cascade lasers, and coupling theory of a Bragg waveguide. The results strongly indicate the possibility of single-mode laser oscillation.

ER -